Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Hot Spring Spas No Fault Heater 4 kW, Model 73791. Please read this manual thoroughly before installation or use to ensure proper function and to prevent damage or injury.
This heater is designed for specific Hot Spring, Tiger River, and Limelight spa models from 2003 to current that utilize 4kW heaters, including Envoy and Vista models. Ensure compatibility with your spa before proceeding with installation.
Safety Information
WARNING: Electrical shock hazard. Installation and servicing must be performed by a qualified electrician or spa technician. Disconnect all power to the spa at the main breaker before attempting any installation, maintenance, or inspection.
CAUTION: Ensure the spa is completely drained and cooled before attempting any installation or maintenance procedures on the heater.
- Always follow local electrical codes and regulations.
- Do not operate the spa without proper water levels.
- Never attempt to bypass safety devices or modify the heater.
Setup & Installation
The No-Fault PDR Titanium Heater 4kW is a replacement component. Follow these steps for proper installation:
- Power Disconnection: Turn off all power to the spa at the main electrical breaker. Verify power is off using a voltage tester.
- Drain Spa: Completely drain the spa water according to your spa's owner's manual.
- Access Heater: Locate and access the existing heater assembly within the spa's equipment compartment. This may require removing access panels.
- Disconnect Wiring: Carefully disconnect the electrical wiring from the old heater. Take photos or make notes of the connections for accurate reinstallation.
- Remove Old Heater: Disconnect the plumbing connections (unions) and remove the old heater from the spa's plumbing system.
- Install New Heater: Position the new Hot Spring Spas No Fault Heater (Model 73791) in place. Ensure proper alignment with the plumbing unions.
- Connect Plumbing: Securely attach the plumbing connections (unions) to the new heater. Hand-tighten first, then use a wrench for a snug fit, being careful not to overtighten.
- Connect Wiring: Reconnect the electrical wiring to the new heater, ensuring all connections are tight and correct. Refer to your spa's wiring diagram if unsure.
- Refill Spa: Refill the spa with water to the recommended operating level as specified in your spa's owner's manual. Inspect for any leaks around the heater connections.
- Power On & Test: Restore power to the spa at the main breaker. Turn on the spa and test the heater's functionality. Monitor for proper heating and any error codes on the control panel.
Image: Hot Spring Spas No Fault Heater 4 kW (Model 73791). This image shows the complete heater unit, including its titanium heating element and electrical connections.
Operating Instructions
The No Fault Heater operates automatically in conjunction with your spa's control system to maintain the desired water temperature. Once properly installed and powered, the spa's control system will manage the heater's activation and deactivation cycles.
- Temperature Control: Adjust the desired water temperature using your spa's primary control panel. The heater will engage as needed to reach and maintain this setting.
- Indicator Lights: Consult your spa's main control panel for any heater status indicators or error codes. These lights provide information on the heater's operational status.
- Automatic Operation: The heater will automatically turn on when the water temperature falls below the set point and turn off once the set point is reached.
Maintenance
Regular maintenance is crucial for ensuring optimal performance, efficiency, and longevity of your Hot Spring Spas No Fault Heater.
- Water Chemistry: Maintain proper spa water chemistry (pH, alkalinity, calcium hardness, and sanitizer levels) as unbalanced water can lead to corrosion or scaling on heater components, reducing efficiency and lifespan.
- Flow Rate: Ensure adequate water flow through the heater. Blockages in filters, low water levels, or issues with the circulation pump can restrict flow, causing the heater to malfunction or shut off due due to safety limits. Clean or replace filters regularly.
- Visual Inspection: Periodically inspect the heater and its electrical and plumbing connections for any signs of wear, corrosion, leaks, or loose wiring. Address any issues promptly to prevent further damage.
- Winterization: If winterizing your spa, ensure the heater is completely drained of water to prevent freeze damage. Follow your spa's specific winterization instructions.
Troubleshooting
If your heater is not functioning correctly, refer to the following troubleshooting guide. If the issue persists, contact a qualified spa technician.
- Heater Not Heating:
- Check the spa's power supply and ensure the circuit breaker has not tripped.
- Verify that the water level is adequate and the circulation pump is running, indicating proper water flow.
- Inspect for error codes on the spa's control panel. Consult your spa's main owner's manual for specific code definitions and remedies.
- Ensure the thermostat setting is above the current water temperature.
- Frequent Heater Tripping:
- Check for proper water flow. Clean or replace dirty filters if necessary.
- Inspect for air locks in the plumbing system, which can impede water flow.
- Verify electrical connections are secure and free from corrosion.
- Error Codes:
- Specific error codes related to the heater (e.g., 'heater limit trip', 'flow switch error') typically indicate a problem with water flow, temperature sensors, or the heater itself. Always refer to your spa's control system manual for detailed diagnostics and recommended actions for specific codes.
Specifications
| Model | 73791 |
| Type | No-Fault PDR Titanium Heater |
| Power | 4 kW |
| Compatibility | Hot Spring, Tiger River, Limelight models (2003-current) requiring 4kW heaters (e.g., Envoy, Vista) |
| Product Dimensions | 15 x 6 x 6 inches |
| Item Weight | 0.01 ounces |
| Manufacturer | Watkins |
Warranty Information
For specific warranty details regarding your Hot Spring Spas No Fault Heater, please refer to the documentation provided with your original spa purchase or contact Hot Spring customer support. It is recommended to keep your purchase receipt as proof of purchase for any warranty claims.
Support & Contact Information
For technical assistance, replacement parts, or professional service, please contact your authorized Hot Spring Spas dealer. They are equipped to provide expert support and genuine replacement parts.
You can also visit the official Hot Spring Spas website for additional resources, FAQs, and dealer locators.
Manufacturer: Watkins
